I know the faint line was a negative, it is just that every time in my life that there have been big stakes, extreme caution has been the watchword.

It is almost a certainty that I would not be here now without this trait.

My caution in this instance may result in a negative dilution. And at this point, I have purchased about ten FirstCheck test kits. Expensive, but they console the paranoid.
The next step is to report on the results and to try and be as accurate as possible so others may benefit.